From the video, you only connect the humidity sensor block to the display. This sensor has its special node mode. On offline mode,display mode can display to values from the one sensor. If you want to display two values from two different sensors. The mode node is different and it is not supported now.

On online mode, the display mode doesn't display two sensors directly. But if you want to challenge the program with the merge text, it can be achieved to display two sensors value.